What Is Engine Overhaul?

Engine overhaul refers to the dismantling of the engine and related parts, dismantling the entire engine structure, replacing damaged parts, and then reassembling the engine. The whole process is quite complicated to operate. The overhaul is due to the wear or failure of the internal parts of the engine. It is necessary to disassemble the engine and check which parts need to be replaced. At the same time, it is necessary to disassemble and re-clean all related parts, including the main body of the engine, the attached water tank radiator, and oil circulation components. After the engine is reassembled, a new run-in test run is required. During the run-in period, the overhauled car can only run at low speeds, and it is not suitable for vigorous driving. Engine overhaul is a very technically difficult project, and it takes about a week for repairs, so it is still necessary for daily driving. Operate properly to avoid excessive damage to the engine.

How do you know if you need an engine overhaul?

Generally, mechanical parts need to be overhauled after a certain number of years or kilometers. Vehicles need to be overhauled from 100,000 kilometers to 150,000 kilometers. However, the main reference is still in the relationship with the vehicle's technical performance.

After the following situations occur, there is a problem with the engine:

• Blue or black exhaust - one or more cylinders may be burning oil, or your fuel is running too rich or too lean.
• White Exhaust - Coolant may be burning in one or more cylinders.
• Engine knocking – the combustion timing of one or more cylinders may be off, or oil contamination may occur.
• Reduced acceleration/hard start - possible loss of cylinder compression.
• Increased oil consumption - the engine may be leaking or burning oil.
• Low fuel economy - cylinder compression loss or excessive fuel circulation.
• Low oil pressure - oil may not be reaching all components.
• Poor engine braking - possible loss of cylinder compression.

Cummins engine overhaul cost

At present, the cost of MYMRO 5.9 Cummins overhaul kit is between $1000 and $2000, and the specific labor cost and spare parts price depend on the state of the cylinder head, cylinder block, crankshaft, etc. If nothing breaks or wears out in any way beyond repair, you could end up with a total price of between $4000 and $5000.

The following is the price of the main accessories sold in the current market:

• Removal of long blocks - $400-$700.
• Reassembly - $600-$1000.
• 1 Set Pistons STD, 1 Set Piston Rings, 1 Set Piston Pins, 1 Set Piston Circlips,
  1 Set Cylinder Liners (Semi-finished product),
  1 Set Main & Con Rod Bearings,1 Set Intake & Exhaust Valves,1 Set Valve Seats,
  1 Set Valve Guides, and 1 Set Repair Kit ——Total $1000
• Labor cost: $1000~2000